i need some help here. An object of mass m falls from a height h_1 and rebound to a height of h_2 . write an expression for its momentum.


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Question Number 64697 by Rio Michael last updated on 20/Jul/19

$i n e e d s o m e h e l p h e r e .$ $A n o b j e c t o f m a s s m f a l l s f r o m a h e i g h t h_{1} a n d r e b o u n d$ $t o a h e i g h t o f h_{2} . w r i t e a n e x p r e s s i o n f o r i t s m o m e n t u m .$
	Answered by peter frank last updated on 20/Jul/19

	$i m p u l s e = c h a n g e o f m o m e n t u m$ $F = m . Δ v$ $v_{1}^{2} = 2 {g h}_{1}$ $v_{2}^{2} = 2 {g h}_{2}$
	Commented by Rio Michael last updated on 20/Jul/19

	$t h a n k s, F = m . △ v$ $v_{1} = \sqrt{2 {g h}_{1}} a n d v_{2} = \sqrt{2 {g h}_{2}}$ $a n d F = m (v_{2} - v_{1})$ $F = m (\sqrt{2 {g h}_{2}} - \sqrt{2 {g h}_{1}}) ? c o r r e c t ?$
	Commented by peter frank last updated on 20/Jul/19

	$y e s$
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